// Copyright (C) 2003--2004 Ronan Collobert (collober@idiap.ch)
//                
// This file is part of Torch 3.1.
//
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
//    derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "IOBufferize.h"

namespace Torch {

IOBufferize::IOBufferize(IOSequence *io_torch_)
{
  io_torch = io_torch_;
  n_sequences = io_torch->n_sequences;
  frame_size = io_torch->frame_size;
  bufferized_sequence = new(allocator) Sequence(0, frame_size);
  bufferized_sequence_index = -1;
}

void IOBufferize::getSequence(int t, Sequence *sequence)
{
  bufferizeSequence(t);
  sequence->copy(bufferized_sequence);
}

void IOBufferize::bufferizeSequence(int t)
{
  if(t != bufferized_sequence_index)
  {
    int n_frames = io_torch->getNumberOfFrames(t);
    bufferized_sequence->resize(n_frames);
    io_torch->getSequence(t, bufferized_sequence);
    bufferized_sequence_index = t;
  }  
}

int IOBufferize::getNumberOfFrames(int t)
{
  return io_torch->getNumberOfFrames(t);
}

int IOBufferize::getTotalNumberOfFrames()
{
  return io_torch->getTotalNumberOfFrames();
}

IOBufferize::~IOBufferize()
{
}

}
